The second is imprinting something extremely repetitive, such as a board sweeper, so that the game cannot move forward
Though the body is a bit small, having two Negates sitting in play is devastating to combo and control strategies
Trostani is going to love Blossoming Bogbeast, and Ezzaroot Channeler is basically Rakdos, Lord of Riots without even having to go to combat
For this particular card, having Equipment attached to Cloud or any other Creature lets you draw cards, per equipped Creature
Sephiroth is a big, bad villain in the Final Fantasy universe
These kinds of cycles are important (if highly situational) for flavour and gameplay, but all I can really comment is the art -- I do like the elaborate 'real beetle' art of Black Scarab and the much fancier Blue Scarab